The Pi of the Sky experiment, located at Las Campanas Observatory in Chile, searches for rapidly changing optical
objects such as optical counterparts of Gamma Ray Bursts. The system consists of two CCD cameras placed on
parallactic mount and operated by a PC equipped with dedicated software. The data acquired is reduced and essentially
only the brightness of stars is stored in the database. A web interface for the star databases offers easy and quick access
to the experiment's data and to other star catalogs that are also stored in our databases.